Control attachment for engine lathes



June 19, 1928.

B. J. CALLAN CONTROL ATTACHMENT FOR ENGINE LATHES Filed Jari. 4, 1927 2Sheets-Sheet mum INVENTOR June 19, 1928; 1,674,465

' B. J. CALLAN CONTROL ATTACHMENT FOR ENGINE LATHES Filed Jan. 4, 1927 2Sheets-Sheet 2 Patented June 19, 1928.

junirsn STATES BERNARD J. CALLAN, on NEW CASTLE,

PATENT OFFICE.

PENNSYLVANIA, ASSIGNOR TO JOHNSON- BBONZE COMPANY, OF NEW CASTLE,PENNSYLVANIA, A CO RPORATION OF PENN- SYLVANIA.

CONTROL ATTACHMENT FOB ENGINE LATI-IES.

Applicationfiled January 4, 1927. Serial No. 158,994.

This invention relates to engine, or machine lathes, and moreparticularlyto a carriage'control attachment therefor.

In an engine .lathe, there is provided a carriage reciprocable alongthebediof the lathe. This carriage may beoperated in either direction,either by hand or through gearing driven by the lathe. The control leverfor the automatic drive is, in the ordinary lathe, always positioned onthe apron of the carriage at the end of the carriage most remote fromthe head stock of the lathe. This arrangement is highly satisfactory formost classes of work, but is not convenient for the turning of smallobjects such as sleeves and bushingswherethe machine is operated atarelatively high speed and where the piece has to be frequently changed.In the standard lathe, the opera-.

tor has to use that hand for controlling the automatic feed which healso uses for placing pieces in the automatic chuck of i the lathe orfor removing finished pieces from the chuck. Consequently the locationof the control lever is not well suited for this class of work.

' According to the present invention, it is proposed to provide anattachment which will permit of the operation of the control lever fromthe opposite end of the carriage so that the operator does not need touse the same hand for starting and stopping the carriage which he usesfor placing bushings j on the chuck and removlng them from the verseitselfafter a predetermined distance thereon.

of travel, but wherein the movement of the carriage in eitherdirectioncan be stopped at any time.

The invention may be readily understood I by reference to theaccompanying drawings in which--- Figure 1 represents a side elevationof a portlonof standard engine lathe having a well known type ofautomatic clutch and 7 having my invention applied thereto.

Figure is a detail view on anenlarged scale showing theadjustable stopsfor tie.

lterminingthe movement of thetravel of the carriage.

, Figure 3 isa detail view showing the operating connection between theclutch op erating handle and the carriage control mechanismfl I In thedrawings, 2 designates the bed of a lathe having the usual head stock 3and usual driving pulley 4. The spindle 5 of the lathe is provided witha clutch at 6, and an automatic chuck mechanism 7. The clutch andautomatic chuck are of a type now generally well known, and form no partof the present invention. The arrangement is such that the automaticchuck and the clutch may be simultaneously operated by the movement ofan operating handle 8.

Movablealong the bed 2 of the lathe is a carriage 9 having a dependingapron 10 On the carriage is the usual adjustable tool post 11'. Thecarriage is pro vided with the usual automatic driving means operatedfrom a lead screw .12, and

including a reversing gear designatedv gen erally as 13 dr ving a pinion14 for engagement with the rack 15 on the bed of the lathe. This generalarrangement is quite common in engine lathes.

Carried on the apron of the lathe carriage is a control lever 16 foroperating the reversing gear 13. This operating lever is in the positionwhere it is generally located on all machine lathes, this position beingat that end of the carriage most. remote from the head stock- 3.

According to the present invention,

lever 19 is a spring projected detent pin 22" for engagement withrecesses 23 in the bracket. In the intermediate position, the lever 19holds the lever 16 in a neut a1 position. A movement 0t tile 161 01. 19in either direction from the neutral position shilits the-*lever 16 tooperate the reversing drive: mechamsm13 to cause the carriage to travelin the desired direction.

VV'ith such an arrangement the travel. of the carr1ageca'nbe controlledby the operator with his left hand, leaving his right.

hand entirelyfree for the applicatioi'r of bushings to the chuck andtheremova-l of machined bushings therefrom.

According to thepresent invention, it is further proposed to'providemeans whereby the movement of the carriage may, 1n: addition beaut'on'iatically controlled to a certain" extent. To this end a rod 2 1is mounted in a bracket-'25- on the frame' ot' the lathe. Un

this'rod are spaced apart stop members 26;

These members, which arein the nature of collars, are adjustable on therod and can be fixed by means 01 setscrews 27. Each collar is preferablyprovided with a spring projected cushioning pin 28i The pins 28 areturned in opposite directions and are located' in the path of movementoi" the lever 19. When the carriage moves in one direction to apredetermined extent the lever 19 comes'into contact with the cushioning13in 28 of one of the stopcollars. As the carrlage continues to movewhlle the stop collar holds the lever against movementthe lever willbe=shitted. A predetermined movement of the carriage in the oppositedirection will bring the stop lever 19 into cooper ativ e engagementwiththe cushioning pin '28 of the other collar? In Figure 2 the arrange--ment is clearly illustrated, the view show ing the position of the lever19 just belore it comes into engagement with one of the stop collars.

Inasmuch as it'is necessary to stop the lathe to remove finishedbushings or other articles being turned and substitute bushing to befinished, the present invention proposes to provide a connecting linkbetween the le ver 19 and the chuck controlling lever 8. Connected tothe upper end of the lever 19 is a clevis 29 having oneend ot a link 30pivotally connected thereto at 81; the other end of the link 30 isthreaded. The threaded portion of the link passes through aspherinewness cal bearing 31 in a boss 32 on the operating lever 8. Onthe link 30 at each side of the boss 32 are nuts 33. The arrangement issuch that the link 30 may slide through the spherical bearing 31 apredetermined disfrom the provision ot-a cont-r01 'lever'so dis posedthat the operator can use-his right hand for removing. and placingthe-bushings in the chuck while controlling: the 'movement ot thelathe'carriage with his left hand. A turther advantage. or thelllVGlltlOIllGSlClGS in the provision of stop means for automaticallydeterminingzthe movement ot'theca-rriage and for controlling themovement of the carriage Still a further advantage ot the inventionresides in 'thelost motion coir neeted between control lever19 andthecontrol lever B This last mentioned arrange ment permits otthe-stopping and starting 01" the lathe and the stopping and starting;of the carriage simultaneously and With a sin gle movement of the lever8.

l v hil'e l have illustrated a specific embodr' ment of myinvention, itwill be understood that the invention may be otherwise einbodied andthat variousmodifications and changes may be made 1ntheconstructionillustrated within the spirit of my invention and under thescope of the appended claims;

I claim: 1. The combination with an engine lathe having a carriagemovable therealong, driving-ineans for thecarriage, a lever at one sideof the carriage below the top of the can riage for controlling theoperation" of said drivin i means, a vertically disposed operat inglever pivotally mounted atthe other end of the carriage and projectingabove the top oi the carriage,and a link connecting said operating leverwith said first'lever.

2. Tile combination with an enginedathe' having a head stock,-a bed, acarriage reciprocablealon'gthe-bed, andme'ans for driving 'the carriage,or 'means for controllingthe operation of the driving means, and a V6I'tically disposed operating-1 lever on-the carriage at the GDCl'Ol thecarriage nearest the head stock and having an operating exten sionprojecting above the bed of the lathe for operating said carriagecontrolling means.

3. A control attachment for engine lathe carriages, having a; controllever at oneend of the carriage comprising a vertlcallyextendingoperatlnglever p votally mounted" 4. The combination with a lathe havinga frame and a carriage reciprocable along the frame, automatic means fordriving the carriage, a control for said driving means, a verticallydisposed operating lever on the carriage projecting above the carriage,a link connecting the control lever with the control, and a pair ofspaced stop elements disposed in the path of travel of said operatinglever for tripping same upon a predetermined movement of the carriage ineither direction.

5. The combination with a lathe having a frame and a carriagereciprocable' along the frame, automatic means for driving the carriage,a control for said driving means, a vertically extending operating leveron the carriage and projecting above the'carriage, a link connecting thecontrol lever with the control, and a pair of spaced ad-' justable stopelements disposed in the path of travel of said operating lever fortripping same upon a predetermined movement of the carriage in eitherdirection.

6. The combination with an engine lathe having a clutch, a carriagereciprocable along the bed of the lathe, automatic driving means for thecarriage, a control for the carriage drive, and means for simultaneouslyoperating the clutch and the control for the carriage driving means.

7. The combination with anvengine lathe having a chuck operating leverthereon and having a carriage reciprocable therealong, and havingautomatic carriage operating means with a control lever therefor, of anattachment for simultaneously transmitting motion from the chuckoperating lever to the said control lever.

8. The combination with an engine lathe having. a chuck operating leverthereon and having a carriage reciprocable therealong, and havingautomatic carriage operating means with a control lever therefor, of anattachment for simultaneously transmitting motion from the chuckoperating lever to the said control lever, and astop mechanism forindependently effecting an actuation of the said control lever.

9. The combination with an engine lathe having a chuck operating leverand having a carriage movable along the lathe with automatic means fordriving the carriage and means for controlling said driving means, of anattachment comprising a lever pivotally mounted on the carriage, a linkconnecting the lever with said control means, and a link connecting thelever onthe carriage with Tthe said chuck operating lever, saidlast'mentioned link having a lost motion con.-

nection with. the chuck operating lever.-,.

10. Theicombination with an engine lathe I havingachuck operating leverand having a carriage movable along the lathe with an.-

tomatic means fordriving'the carriage and means for controlling saiddriving means,

of an attachment comprising a lever pivotally mounted on the carriage, alinkconnecting the lever with said control means, and a link connectingthe lever on the carvriage with the said chuck operating lever,

said last mentioned link having a lost motion connection with the chuckoperating lever, and adjustable stops'in the path of travel of the leveron the carriage for effecting an operation thereof upon a predeterminedmovement of the carriage.

11. The combination with an engine lathe having a carriage, carriagedriving means, a control for the carriage driving means, a linkconnected with the control and extending along the carriage, a lever onthe other end of the carriage to which the other end Y of said link ispivotally connected, a second link connected with the opposite end ofsaid lever, a clutch operating lever for the lathe through whichthesecond link is slidably passed, and spaced apart stop elements on thesecond link for limiting the lost motion between the second link and thesaid clutch operating lever.

12. The combination with an engine lathe having a carriage, automaticdriving means for the carriage, control for said driving means, andhaving a chuck operating lever, of an attachment therefor comprising alever pivotally supported on the carriage, a link operativelyconnecting'the said lever on the carriage with thesaid means forcontrolling the automatic driving means for the carriage, a linkconnecting'the said lever on. the carriage with the said chuck operatinglever, said'last link having a lost motion connection with the saidchuck operating lever, a supporting bar 011 the lathe,-and adjustablestops on the supporting bar in the path of travel of the lever on thecarriage for effecting an operation of the lever upon movement of thecarriage to a predetermined extent, I

13. The combination with a lathe having a head stock, .a carriage, meansfor-driving the carriage, a control member for said driving meanslocated at the end of the carriage remote from the head stock, a leverpivotally supported on the carriage at the end nearest the head stock,and a link connecting-the lever with said control member.

14. The combination with a lathe having a head stock, a carriage, meansfor driving the carriage, a control member for said drivremoter6111 thehead stoclgalever pivbtally of said-level; said -stpps being adapted to.supported-0111M'carniagat che end-near effect anmpemtionofthe lever uponmoveest thpflhe'ad stockywlink cdnnectingflthe' m'enbof' the-carriageineither-direction to a 10 lever with said control 'membelya and a suppredetermined extent.

5 portingba-r on the lathe,- stops onthe snp-i In testimony" Wh reef Ihave hereunto set port-ingloar Havingicushioned lever engaging amyhand;mean's therenn (lispfis'eddn the'pathof travel BERNARD J. CALLAN.

